Sounds like you don't read the manga.
It stated they were normal humans but because they kept hanging around Ichigo, they developed their powers. At that point in time, they had no powers so my argument still hold true. I also liked the fact you clearly ignored how objects can hit them too.
I can even go with this approach too if it's not good enough for you.
How about the fact when some humans get captured by hollows they can hit them. That's fodder humans hitting hollows. They also wouldn't be able to grab them either if they truly were in a spirit form, but since they do, physics state that if you use any force on an object, that same object uses the same amount of force back.
Let me dumb that down for you.
If a hollow touches a human, that human is also touching a hollow. Doesn't matter how they are being touched, the reaction is still there.
And Naruto and Bleach characters can see them. Just because Bleach Humans can't doesn't mean One piece and Naruto characters can. Both in Naruto and One Piece characters have seen spirits/ghosts.
I'll take a post I made the other day and copy and paste it.
I hate this argument. It have been around forever but people always ignore the new feats to prove this wrong.
Naruto characters can see spirits.
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Here we have Choza looking at Dan in his Spirit form.
Later in that same chapter we get Tsunade and Dan talking. Clearly both pages show Naruto characters able to see Dan in his spirit from.
How about that soul dragon Nagato uses?
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If that isn't good enough we have this here.
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Naruto can see his own soul being ripped out of him AND able to physically grab it.
How can you argue that Naruto characters cant see spirits.
One Piece characters can also.
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There you got Luffy clearly trying to capture some ghosts. He wouldn't even know they are there if he couldn't see him.
Even as early back as Skypiea, Usopp saw a spirit too.
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We later find out what it is when Franky tells the story in the Water 7 Arc.
I didn't even add this into that argument as well.
Not only that, After the time skip, Brook can become a spirit himself and the Mugiwara crew have both seen and reacted to him.
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I mean do you want to argue because Brook is a spirit he can beat everyone from Naruto, DBZ, and One Piece as well?
Both Naruto and One Piece can see Spirits/Ghosts/Shinigami. Just because they are named something different in the other manga doesn't mean they are different. The concept is still the same. They are all spirits.
DBZ>>>>>>>>>>>>>>>>>>>>>>>Juubi>>>>>Naruto>=One Piece >>>> Bleach power wise.
If the best Bleach can do is blow up a small hill with Ichigo at his strongest, there is no comparison. Bleach gets owned. Current Ichigo would get stomped by both Naruto and Luffy(because Ichigo is so much weaker now compared to then, unless you want to prove me wrong with feats of current Ichigo *_*). What's sad is that was 100 chapters ago, and people who argue for Bleach can only bring up those feats. Anything after that hasn't even gotten close to the power levels of Aizen and FGT Ichigo. The ONLY thing close is Yama and by powerscaling Bach. After that, it is all down hill(Zero squad is featless and the Spirit King for all we know could just be a cripple old man with no powers so they can't be brought into any logical debate).
So I'll say this one more time. Stop wanking Bleach. They are not as strong when you put it all into context like I just did. Give it about 3 months though, and I bet Bleach will be on top again, since everyone is about to get a huge power boost pretty quick here. Then we can have this discussion again and I'll tell you from an unbiased view, who is strongest. I could give 2 shits which verse is strongest because the story is what is important. It won't matter 8 years from now anyways when Both Naruto and Bleach have finished and One Piece has gotten such a power up that it will make the other 2 look like fodder. Well maybe, that Juubi is tough to beat.