Being a gig worker is very good if you are always busy because short-term works pay more money than long-term works, it's like the price of the apartment per square is higher when the apartment is small but it gets cheaper as the apartment is getting bigger, it's like buying a single pen vs in bulk.
If the job request comes hardly but goes easily, then it doesn't worth it.
This is not true at all, in fact it is the exact opposite. Short-term work and short-term work always pays less money than long-term work. You are not supposed to be a gig worker for long and neither should you dream of becoming a rich gig worker. It would be the same as playing amateur football your whole life for a living, if that was even possible, and dream of being the next superstar. You are not going to get far this way, the numbers are stacked against you. You should be working on long-term goals and skills that will get you a high paying job while you are working as a gig worker.
By the way, one of the best gig is when you have your own team, find work for them, give work to them, pay them hourly but you manage to negotiate with the client about how much this particular task costs. I know some people who do this and they earn tons of money.
That sounds like a 3rd world thing, there is no chance for something like this in the 1st world. People cost a lot of money, living is expensive.