1.
Your existing customers aren't guaranteed. Bud Light assumed loyalty was permanent and chased new demographics while insulting the base—who left for good.
2.
Brand equity requires constant investment. Cutting $300M in marketing to boost short-term profits left Bud Light defenseless when the crisis hit.
3.
Beer is identity, not just a beverage. What you hold at a party signals values—Bud Light became a political statement overnight and lost its everyman appeal forever.