First let us define profit.
Do you mean 100m a month? Yes that is doable.
Do you mean plexing your one account doing over 1b profit per month? That is questionable.
Most people who do indy have a lot of accounts. Some have 5-10 accounts with only indy toons. This is because scaling industry is hard since you get at most 11 slots per character. There is a cap in the amount of profit you can make based on these slots and the market.
You need to set a goal on how much profit per month you want to make then plan your amount of characters accordingly.
Industry is a very costly upfront investment with the amount of BPOs and research that need to be done. T1 industry is rarely worth it because so many low SP players are doing it with their “free minerals”. You need to be omega and do T2 or bigger to make profits. But even then you can see things like freighters being sold at below mineral cost because miners don’t value their time and opportunity cost.
If this game was real life, a lot of players would be personally bankrupt at this point.