I install these regularly. Here’s what I do.

Where there is a stud, use one of the supplied screws. In one of the other holes on each side of the mount, use one of these. You’ll be just fine. Because the tv sits so close to the wall and doesn’t pull out, all the force is directed almost straight down.

Your friend has shared a link to a Home Depot product they think you would be interested in seeing.

https://www.homedepot.com/p/FLIPTOGGLE-1-4-in-x-2-1-2-in-Toggle-Bolt-10-Pack-425R/206347693