To be fair, this was when they were just coming into London and offering crazy bonuses to steal market share from Deliveroo, but still, this isn't controversial - if someone pays you bad wages, don't work for them...
If you can't find work elsewhere, you'd rather work for pennies than for nothing.
You could say the same about any regulation, if you cannot manufacture something at a reasonable price without polluting more than allowed, you need to change your prices or adjust your business model.
Out would be better if kfc rained from the sky, but that's not an option.
Why is their business model "poor"? If prices go up, so will what is considered a "reasonable" wage. What's a "reasonable" skillset that an employee must offer to get such a wage.
Difference with pollution, is that its fine to just not pollute. Just not employing makes the situation worse.
Why should be corporations be given a free hand to act in ways that increase costs, increase personal risk, and lower opportunity for all but a tiny subset of the population?
At the level of an economy, the burden is on you to show that minimum wage results in lower risk/higher opportunity for employees.