Nope, definitely not worth it in my opinion.
I've had around 25 AEGs, mainly from the lower end, CYMA, JG, A&K and a few ClassicArmy and ICS.
None have ever failed me mechanically plinking at home or at a game day. (I did have an occasion where a battery clip came off the fuse)
It can be hard to find a trusted tech. As @Adolf Hamster said, there's no guarantee it will come back better than when you sent it.
Much better to get a budget CYMA or JG backup because any gun can have a problem or break on a game day.
Open up the backup and learn to tinker yourself. Most upgrades and servicing are quite easy and you can find a tech for the complicated things.