Why such a stigma with fidelity bitcoin investment?

I just want to preface by saying I’m not trying to convey anything negative and I’m just genuinely curious here, so put away the pitchforks .

That being said, I understand the cold wallet thing and how they say if “you don’t own the key, you don’t own the coin” saying. I get it. But if I’m just investing in the idea of it just to make a profit on it through Fidelity, Robinhood, etc, then wherein lies the danger of that?

I personally think that if I were to invest in the actual storage and get the actual coin, I open more possibilities of liability (theft, being a dumbass and losing the wallet, technical error from my naivety, etc) as opposed to just opening up an app on my phone and checking on my (bitcoin) investment.

As I said, I’m not trying to buy for the fact that I will actually use the coin. I just see the returns and I think it would be a good investment. It seems though that the general consensus here is completely against that and if I don’t go the cold wallet route, I’d be a fool.

Just want to know if I’m missing something here