Just to put this point into context, in the last 10 years the title has been won by a redshirt team twice - rags in Taggart's last season and Liverpool's covid-interrupted season.
In the four decades prior to that - 1973-2012, it is easier to count the number of times a redshirt team (rags/Arsenal/Liverpool) did not win the title.
The answer, as I count it, is 12.
First Division: Leeds 1974 and 1991, Derby 1975, Forest in 1978, Villa in 1981, Everton in 1985 and 1987
PL: Blackburn in 1995, Chelsea in 05,06 and 10, and us in 2012.
So 28 seasons out of 40 in the period 1973-2012 the league was won by a redshirt team.
In the same period a redshirt team won the FA cup 19 times. Almost half. And in the same period the league cup was won by a redshirt team 14 times. Together with a series of European wins that I'm not going to bother with.
Going back to the last 10 years, a redshirt team has won the FA cup 5 times (four of them Arsenal) but has not won the League cup at all.
The fall from grace of those three teams has been fairly clear in terms of their trophy counts in the last decade. But it's not surprising that once upon a time the people writing about football thought the redshirts' domination would last forever.