Any suggestions?

Driver side - front end bouncing/vibrating all the way through the steering
wheel at speeds from 50 - 80 with the problem being felt more at lower
speeds in the 50-60 range.

The wheels have been balanced/rotated & the alignment is correct.

I've been advised for 1k the struts can be changed (both sides need
replacement), but does anyone concur or is this a scam?

Is it possible that a loose motor mount could cause a shake that powerful to
vibrate through the steering & make the hood flutter a bit too. We had the
motor replaced at 50k by GM & the car now has 105k on it, but it seems like
it's been doing this for 2 years now.

A wrote:
Struts are good for about 65k miles. Your car is 40k overdue.
It's a wonder a wheel has not come off.
Always replace both sides.
If you have normal suspension, cost should be around $100-$200 per strut.
The rear struts on your car also last 65k miles.