[Mr.ac]

Your mechanic is half right, half worng. But overall if he isn't actively on a race track I wouldn't agree with everything he says.

The problem he sees is high mileage cars that put lowering springs on old and tired struts. The loss in the support puts extra work. So yeah the strut would give out shortly.

Ideally you want new lowering springs and performance dampers when you swap it out.

In your case since you don't plan to track your car, you'll be ok. If your car has over 80k miles on the original struts then it might me a good idea to replace the struts. Also keep away form super low drops, they just add more stress.

I'll go with TRD springs or from what I seen they are rebadged Eibach pro kits