Every job in every industry has some "pressure", "stress", or "burdens" for that job. Being a PPL feels free, but I'm paying for flying. Working as a pilot, I get paid for flying. BUT, before I decide I want to join this industry, what are the burdens that an airline pilot has to face routinely? Does it vary if you're working for a small regional airline vs major international airlines?
This is a very broad topic and is heavily opinion based.
Vast majority of commercial pilots do love flying and that's the reason they go through the abuse by airlines. All GA pilots also love flying but either cannot afford the abuse or don't have time for it, so they just pay to satisfy this hobby.
So to answer your question, some of the burdens are:
- High costs of training
- Waiting a long time (2 years or more on occasions) before getting hired by an airline
- Very low salaries in the beginning (several years)
- Losing seniority (very often) when you go to another carrier
- Staying away from home a lot
- Very unstable industry
- Many pilots eventually get bored and frustrated (regardless of initial enthusiasm)
Having said that, there are many many great benefits, too. The bottom line is that people only get into this career if they love it deeply.
The question you have to ask yourself is: Am I willing to undergo this trouble for my passion?
P.S.: The above holds true for the airlines and pilots in the US.