When a share buyback occurs the seller creates a taxable event for themselves through capital gains.

It's just buybacks are considered 'better' because the event is the choice of the seller, and occurs when it is for them. A dividend is 'thrust' upon a shareholder whether they want it or not. (And not investing in dividend-paying companies can be a non-starter: the company in question may be quality one that is worth owning (regardless of dividends, or buybacks)).

The problem is not buybacks or dividends: it is (a) possible executive chicanery, and (b) a lot of the general public not having the means / spare cash to get their foot in the door in investing.

How many people are reeling from dividend taxable events, and do we really need to look after them? Can't they just plan ahead? I'd bin buybacks and let these guys plan ahead.

Hard to know: pensions, trusts (private or for foundations), you indirectly by holding an index fund (the fund handles it on your behalf, but it can still create a drag on returns).