Yes but the employer-employee relationship is entirely consensual and in most situations non-binding.
If you don't like your wage, you don't have to work that job, nothing is forcing you other than need for money.
For certain trades, paid apprenticeships exist where you can expand your skillset while also being paid, at no additional cost to you.
Labor in capitalism isn't slavery. It isn't compelled by force. Nobody is holding a gun to your head telling you that you HAVE to work a particular job. Ironically, this is commonplace in communism.
yeah, but it helps explain the phenomenon of labor prices being 'sticky,' which ultimately hurts laborers and economic recovery. still, since you have to work to survive, oftentimes you may not have an opportunity to reject a job offer in hopes of finding a better one. i suppose there's nothing stopping you from continuing to search while working that job, though i feel like a lot of employers would frown upon that