I am far more a fan of "Quickstart" rules as a means to try out a new system than "starter sets".
Primarily because with the Quickstart I get a decent enough of an introduction to a rules system that I am confidently able to judge whether or not I find the RPG interesting enough to buy.
Quickstarts also tend to be outright free. If not, the cost is nominal.
My view on "starter sets" is heavily colored by the fact that my intro to RPGs was B/X D&D.
So get out your grains of salt kids...
IMHO: "Starter set" = cripple ware.
In ye olden times... You bought the D&D red box you got some beginning levels, two rulebooks and a module; more than enough to start a game. The you got the "expert set" and you then had a complete game. Yes, B/X was a kind of glorified sales pitch for AD&D, but it was also a complete game in and of itself. The only thing really driving you to AD&D was peer pressure...
Modern starter sets tend to be outright capped at low levels, you don't have a complete game, you never will, and they cost actual money.
I their defense: modern day starter sets are explicitly driving you to the full rules sets. They are named honestly.
But for me they are just not not worth the ROI if I am already inclined to get the "full game". As a long time player and GM of many different systems I am honestly not the target demo for them.