How many hours do you think are required to do analysis (especially on professionals where there is already 1000's of hours of video)? This is what Spring Training is for. It is why Dunedin has data driven analysis on site. The next part is taking the data and making material changes. For every driveline success stories, I am sure there are 10 which did not use the data to make the needed changes. Some probably ignored and believed in it.
It is also possible that Betts is going because he hates the conditioning part of early spring training. Something that we don't want Vlad to miss.
In the end, everything before opening day is optional for the player (including spring training). We have no idea if Vlad is open to any swing or approach changes, or if they have asked him.
Jays have 2 more years to decide if Vlad is a legit 160 wRC+ guy or 130 wRC+ guy. Both are helpful to the team