A big point of seeing a tailor is getting yourself fitted for custom clothing that is specifically made just for you. As someone who's bought $200 off-the-rack suits and $2,000 tailor-made suits, there's a world of difference between the two, especially when you have an atypical body type.

(Granted, to the main point, I still think a tailor could be automated in some distant future, but we'll need robots to perform physical interactions, not just software.)

A huge part of the tailoring business are making small adjustments to cheap clothing to get them 90% of the way to bespoke.

If you’ve never done it, I strongly recommend getting your jackets tailored. Even a casual jacket will fit and look non-trivially better for $50-$100 and an afternoon at your local tailor. You can even get things like cycling gear tailored.

Not if you want any tailoring to be done.

Rich people still get suits custom made specifically to their measurements and preferences. They cost about $20,000 USD. It would be cool to have this process automated and affordable to the masses.

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Uh.. I don't mean to be that guy, but tailors aren't even operating in that market.

People who use tailors aren't interested in off the rack items.

Even when they do purchase off the rack or even secondhand items..

they'll go have some of those items tailored.