I do believe it is possible to make 30%/month or more. But that said i also think it is extremely hard to do so because of the human mindset.
If one can make 6-7% per month he could also make 30% per month, the only thing is the drawdowns will be much more difficult to handle mentally and that is where traders fuck up.
With a 1M account a drawdown of 30% or 300K will be much more difficult to handle and recover than a drawdown of 4-5%.
Also, why would you want to take so much risk with a 1M account ... 5% per month would make you more than enough to live off.
Professional traders aim for lower returns because of their clients not accepting more risk.
If they wanted they could also take more risk and possibly more reward, but of course with the risk of more downside as well.
Hmm. I can't confirm that. The way I now trade is the most comfortable I ever had in the past.
Because: I'm no more doing any daytrading, I just concentrate myself on the expiration Friday.
And: short options are "Like Ice in the Sunshine"...

Ie. time is your friend: you profit even if the underlying doesn't make any move...
Say you are in the negatives, then just wait some hours and you will see a better result.
Of course it's not that simple, I'm also doing some scale-in, ie. averaging...
Regarding the motive: just taking the max possible that is easily doable, ie. a kind of optimization.
If a position of mine is say 10% in the negatives then I don't close it, I rather make use of the time decay, and increase the position even more to come nearer to the center line...
But that's me... Like every trader I have my own risk and comfort level...
Of course in reality it's not that simple, one has to use some hedging...