Can't agree with this more! Seriously, if you're a fan of live music, grab a pair and just try it at the next concert you go to.
Its a signal/noise attenuation, you'll hear _more_ detail, not less.
A pair like these are what I'd consider 'high end':
https://www.amazon.com/ETY-Plugs-Fidelity-Earplugs-Standard-...
But I've always got a cheap set from the pharmacy in my pocket or the car somewhere. Something like this is perfect:
https://www.walmart.com/ip/HEAROS-High-Fidelity-free-case/15...
Has been like this forever and have never had any (other) problems with my hearing.