A lot of amp "techs" don't know much about electronics. All they know is what to replace on a particular popular model for a given symptom or how to perform popular mods. Often, they call anything that doesn't meet that criteria a piece of junk and/or tell you it's not worth repairing because they don't know how.
Amps with circuit boards are hated by another breed of tech (and sometimes the same as the first) that doesn't want to go through the trouble of taking the amp apart further than removing the chassis from the cabinet.
Some amp models may be great, but are a pain in the A$$ to repair because of complexity or construction. The OP's amp may be a solid amp, but it's not exactly as simple as a Deluxe. This tech could be great and is expressing frustration because he hates working on that model or he knows he will have to tap deeply into his troubleshooting chops. I was a tech and hated repairing certain amps. It didn't mean they were junk. Also, time spent on an amp like that means you can't spend time on your bread and butter amp repairs. Many times techs don't charge you for actual time spent (it can be days), they charge you fair, affordable standard hourly rates per job. Even though they may have spent days troubleshooting (plus figuring out how it's supposed to work when it's not broken), they may end up replacing one 5 cent part to fix the whole thing and charge you for an hour or 2 of labor. Enough times of dealing with amps like that can = his response.
Amps with circuit boards are hated by another breed of tech (and sometimes the same as the first) that doesn't want to go through the trouble of taking the amp apart further than removing the chassis from the cabinet.
Some amp models may be great, but are a pain in the A$$ to repair because of complexity or construction. The OP's amp may be a solid amp, but it's not exactly as simple as a Deluxe. This tech could be great and is expressing frustration because he hates working on that model or he knows he will have to tap deeply into his troubleshooting chops. I was a tech and hated repairing certain amps. It didn't mean they were junk. Also, time spent on an amp like that means you can't spend time on your bread and butter amp repairs. Many times techs don't charge you for actual time spent (it can be days), they charge you fair, affordable standard hourly rates per job. Even though they may have spent days troubleshooting (plus figuring out how it's supposed to work when it's not broken), they may end up replacing one 5 cent part to fix the whole thing and charge you for an hour or 2 of labor. Enough times of dealing with amps like that can = his response.