Because tax investors were never a threat to farmers

Nearly 50% of farm sales since the 1986 exemption have gone to passive investors, and not farmers. 36% of releif claims last year were for less than 20% of an estates total, showing these farms are small parts of large passive investments.

And those investors will be selling to the companies that can off the best prices

Since the loophole closed, land being marketed jumped 44% year on year. Disproportionatrly non prime land, disproportionately from farms seemingly now scaling down to the 2m threshold, confirming their status as investments. Simple economics shows one element of demand is leaving the industry, increasing availability not just for corporate farmers, but new entry farmers.

Inheritance tax is a huge cost for generational farmers that shows up every 20-40 years

How? Theyve been exempt. If you look at latest agricultural releif claim numbers, its only some 400ish farms that'd hit the threshhold for tax eligibility where the farm is the sole holding. And literally zero of the farms classified as not profitable or at risk of not profitable are in the bracket.

It’s blatantly an attack on small businesses,

Its the opposite, its an attempt to stop the doom spiral the sector was in, where more and more outside money competes with farmers for their resources just to secure favourable tax terms. Land value is already falling. In this instance that is good, as it means farmers arent priced out of their own sector, and theres even less risk of hitting the tax threshold. This tax was quite crafty as it does the absolute minimum it can get away with, just to make farms the 2nd best option for tax consultants instead of the 1st best option, meaning tax consultants will divest their funds and move elsewhere.

marketed to the left

Dont do that dude. Its simple economics.