In general, teams are aware that they can't solely focus on scrum dominance, otherwise we'd have 22 stone props, and bigger hookers.
What we have are converted flankers as hookers, and in general, rare athletic freaks at prop.
The combination of scrummaging power, pace, stamina etc. that we see from modern props is a rare physical skillset which is why top level props are usually expensive.
I tend to think that those teams that really excel at scrummaging are those that maybe do put sightly more emphasis on it at recruitment time, but who also invest significantly more time on the practice field.
Especially with changes to law interpretation, the extra time practicing allows the team to adapt quickly and for the forwards to become a tighter scrummaging unit.
It is a little awkward though with regards to the penalties when a scrum is more dominant than another one.
A knock on is seen as a minor offence so shouldn't lead to a penalty. So knock on --> scrum --> penalty is not something that was really intended.
Free kicks for knock ons solves this, but it's a big step towards rugby League rules