Just goes to show that the Leicester owner is not much of a billionaire if he allowed their best players to be sold and did nothing much in the transfer market to help get the team back to winning ways. Goes to show there are billionaires and then there are Billionaires, they are not equal.
I'm not sure that I would consider that a fair argument.
The two managers who were the inspiration for Leicester's performance that year - Nigel Pearson, under whom they were promoted to the Premier League in 2014, narrowly avoided relegation the following year, (and who had made some excellent buys), and was widely credited with having built the Premier winning team - and, of course, Claudio Ranieri, under whom they actually won the Premiership, the best result in their history (and, remember they have also won the FA Cup in 2021) - were both fired.
Other managers may not necessarily have been quite as good a fit at Leicester.
And, remember, the owner - Vichai Srivaddhanaprabha - who had supported, financed, passionately presided over these years of success was killed traumatically - in full view of some of the players - such as Kasper Schmeichel, who witnessed this - in a helicopter crash on take off from the King Power stadium in 2018. There is no way that this could not have been traumatic for the club.
Unlike, say Newcastle's Mike Ashley, or the Glazers at Manchester United, Srivaddhanaprabha was a passionately supportive owner, not a parasitic one.
Moreover, both Kanté and Mahrez - who departed following Leicester's title win - wished to leave the club; they had rich suitors, - Chelsea (when things were relatively well run at Chelsea), and Manchester City - wooing them.
I am also of the opinion that the more recent departure of Kasper Schmeichel has hurt the club.
"Allowing" players to leave is not really the issue here (Harry Kane notwithstanding). For, if a player really wishes to leave a club, it is very difficult to stand in their way. Thus, the task is to facilitate this in a way that doesn't pernamently damage the club.
Granted, Leicester did buy players; unfortunately, few of these purchases could have been regarded as inspirational.
And that does not take into account the fact that football has changed dramatically since 2016; managers such as Guardiola (with a bottomless budget), and Klopp, have transformed the game, and Leicester lack the means to stay the course with them.