It looks like free research: find a successful account in your niche, copy their tags, save an hour. It reliably underperforms, for three specific reasons.
Their tags are sized for their account
A large account can rank on tags with millions of posts because its early engagement is enormous. Copy those tags into a small account and you are entering competitions you cannot place in. The tags are not wrong; they are wrong for your size.
Their audience is not your audience
Two accounts covering the same topic can serve entirely different people — different countries, different experience levels, different intent. A tag set tuned to their audience brings you people expecting their content.
You inherit their mistakes
Their set may include tags that stopped working months ago, tags carried over from a pivot, or tags that were never tested. Successful accounts frequently have bad tag sets — success arrived through content, not through tagging.
What to take instead
Do not copy the tags; study the vocabulary. What words do they use to describe the work? Which community tags do they participate in? What language do their commenters use? That is transferable in a way a tag list is not.
Then build your own ladder, sized for your account, tested against your audience.