There is no doubt in my mind there is an incentive to keep it 11 against 11 but I'm also of a firm belief that the 'newer' SG1 referees are just not recognising SFP at all either through poor coaching or the pressure of keeping it 11vs11. I think your more experienced referees like Anthony Taylor would of produced a red card in both of those situations yet Tierney is more cautious and just produce a yellow for Jota and does not even think the first one is a foul(!)
As for Coote, well again its the classic case of not recognising SFP even looking at many replays, the fact Tierney did not even blow for a foul for Skipp's challenge suggests to me Tierney either thought he took the ball and did not see the follow through or he did not think it was a foul so surely either one of those would suggest a clear and obvious error has been made, would of been interesting if Liverpool did not win how much of an issue Klopp would of made of that because I thought it was a shocking decision by the referee and the VAR not to punish that tackle.
Slight more sympathy for them both on the Jota one, I think the lack of force(although studs showing obviously does damage) is what saved Jota there but this is definitely the orange card category and I think more people would say red than yellow. That said because of VAR, is Tierney being too cautious by showing a yellow as we mentioned on here previously, it does seem at times referees are going for the safer option as upgrading a yellow to a red via the monitor seems less of a mistake than the other way round.