True, but nobody truly wealthy invests in football to make money off it. That approach is restricted to relative small timers like Levy and Lewis, who are the proverbial pound shop two-bit halibut swimming in a pool of much bigger sharks, billionaires-wise.
Mostly, investors in football use it as a signalling and influence-buying exercise. Qatar invests in PSG because it secures an audience with the French government, which then leads to favorable geopolitical alignment on issues of import (see: them buying Dassault Rafale fighter aircraft).
Saudis invest in Saudi Sportswashing Machine as a way to get the ear of the British government, and also to ensure widespread support in Saudi Sportswashing Machine itself for their wider plans for real estate investment in and around the city.
Football is basically a signaller for intent, for those with wealth to spare. This would be especially true for anyone buying Spurs, a relative blue-chip club for a blue-chip price in the capital of the UK. Buying Spurs gets you instant access to a lot of UK politicians due to the significance of the Premier League.