system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] Why was Sandman in "sand form" through out No Way Home?

Through out the entire movie, when not fighting Marko stays in this humanoid sand form, unlike Spider-Man 3 where he can give himself colour and appear like an ordinary person. 

Was this some sort of voluntary choice or was this the reason he "needed" to be cured? Cause if it was the former, I don't really understand why he had to br cured, unlike Norman, Otto and Connors, his powers didn't have an effect in his personality, the same you could say about Max to a lesser extent, both can control their powers and could live normal lives.

In fact, taking his powers would make his life worse since he is a wanted criminal and would have more trouble slipping awat and visiting his daughter.
gpt
I figured Flint didn’t feel comfortable walking around as his normal self in a strange new universe with magic and crazy technology, a different Spider-Man, and two of his NYC’s most dangerous criminals hanging around alongside a giant lizard and some dude with electricity who all died fighting a superhero. 

As for his powers getting taken away, it doesn’t seem like MCU Peter was making him a cure or planned to, but when all hell broke loose and Flint left he and the other Peters couldn’t take the chance he would cooperate after he’d already been stuck there so long, an assumption proven correct. Given some of the other things going on it seems like he came back from 2024 like Raimi Peter did, so it’s possible the latter would seek him out to make sure he is handling the transition alright. Electro also definitely needed his powers taken away, as we see in TASM2 they were severely warping his mind-he may have been more stable in the MCU with its energy, but coming back there’s no guarantee.