They can be right even if your two options are either a startup or a tech giant. They have their downsides as does every job, even freelance.

I like being freelance but getting the motivation in those first couple of weeks was pretty hard. I also found it tougher to sell my services because I never really had to do it before. Probably some other stuff I can't think of off the top of my head? I don't think any type of work is perfect although I'd go for freelance any day of the week.