It doesn't make syncing harder. I've worked for high-performing global teams for DECADES, so this debate is amusing to me. It shows me which companies absolutely cannot scale past a certain point, and which perpetuate terrible communication and management practices papered over with in person smokescreens.

Work requires effective communication. Global teams place a premium on that and nurture it if they're successful. The remote work dilemma is non-global teams discovering this well-trodden ground and attempting to reinvent the wheel, with a sprinkling of terrible commercial real estate decisions on top.

(Nothing in this response addresses specific team types that benefit from in person work or the entirely valid in-office preferences of individual workers.)