A lot of witnesses and others weren't, because they don't trust exchanges or those specific ones in the first place with their coins. I'd agree, if you're hodling definitely do it in your wallet, but I don't trust exchanges too far anyway. I'm pretty sure they had a bit that they didn't power up so that they could keep liquidity, but one of them has actually initiated the power down at least. The reason some of us complain despite not being affected is (for me at least) that I think it's just wrong for an exchange to power up funds that aren't actually theirs. I'd guess that the reason they, and jsun, are pushing for shorter power downs is because they realized people will complain if they don't fix it soon (I believe most who are opposed are taking their holdings off those exchanges as well, if they had any), meaning they don't have quite enough liquidity. I'm opposed to the change in power down period regardless.