Social media following says nothing about how an agent prices a home, negotiates conditions, or manages a possession date, which are the parts of the job that actually affect your outcome. Reach can help a listing get seen, but it does not replace judgement once an offer comes in.
Where a following genuinely helps is exposure for a specific listing, since more eyes on a well-priced home can mean more early showings. Exposure only converts to a good result if the underlying pricing and negotiation are sound, which a follower count does not measure.
Judge the marketing by results on comparable homes, not follower counts. Get your hand-reviewed valuation from Joel Dyck.