You're ignoring the point on purpose. If he plays in a team that scores a lot of goals that are spread around, then he doesn't need to score 20+ a season. If the number 9 gets 20 goals and the other 3 attackers get 6-7 ot they all get about 10 each it doesn't really matter does it? The team is scoring.
Of course. But as ever, I'm looking at the bigger picture and using historical facts and data to help come to a conclusion. it's similar to my points about our team under Rodgers in the "nearly season" and our lack of defensive solidity now; it will cost us points and no team can concede as many as we do (and did then) and win the title.
"But who cares when we win 3-2?! We score more than them, we win! Simple!" Yeah, but you won't always. Bigger picture. But a different thread probably.
Anyway, back to Firmino. Or more accurately, the need for a successful team that challenges and wins titles to have a regular, reliable goalscorer. If your main striker scores 10 Premiership goals, you won't win the title.
So my issue was that based on last season, Firmino wasn't good enough to be our main attacking threat. 10 goals isn't a good enough return. Because sometimes you need that striker to nick a few games and scratch a 1-0. Or blast in a couple to rescue a game. Like Aguero does. Like Costa can. Like RVN, Drogba, Henry did. Like Kane has for Spurs, helping them deliver a title challenge last season, and finish above us the season before. Goalscoring is the most valuable commodity in a striker.
"Yeah, but we're winning! Who cares who scores?" Again, nobody. But sooner or later we will need to simply rely on a brilliant goalscorer pulling our arse out of the fire.
So I was trying to work out what kind of return would be acceptable for a player who is leading our attack. We've established 10 isn't enough, but it would appear we are making progress, with 15-20 being a more acceptable range. Which I agree with. Hopefully Firmino can deliver. Although I have doubts.