Also, you can easily tell they didn't expect the same reaction and acceptance as Let's Go. It's not very hard to come to that conclusion.
Whereas they were very upfront about that with Let's Go, they tried to be very sneaky with it for SwSh:
- Reveal trailer: No mention of it
- Pokémon Business presentation: No mention of it and focus on Pokémon Home (kinds ironic now)
- Pokémon Direct: Again, no mention of it at all. The biggest focus the game would get for a while and they didn't mention such a big piece of news
- E3 Direct: Nothing. Again.
- They waited till they had a smaller audience to sneakily drop this piece of big news, they were clearly scared of its impact and for good reason.
So no, don't tell me they looked at Let's Go and thought they could easily do the same for SwSh.