I'll suggest a way of looking at it that you might not get from others in the thread.
When you are starting a business, you are faced with an incredibly steep learning curve at the start. Bookkeeping, accounting, compliance, product development, brand development, website, marketing, hiring, selling, etc. You don't know jack shit about any of this stuff and you're basically leaning on the job with whatever experience, connections and capital you have with you to lean on while you figure this shit out.
On top of this, you don't really know what is going to stick or what your target customer wants and is willing to actually fork out some cash for.
Learning this in a very harsh environment when there is not huge economic growth, more limited discretionary spending and fewer distortions from companies that can access credit with much more favourable conditions means that your business is actually going to have a much stronger foundation and less likely to get fucked than if it were built in an environment where all those conditions are opposite.
I think this is the main reason that it's a great macro environment (as in dogshit conditions) to start or try to grow a business. Of course you still have to look at the micro and also how the macro might end up affecting your micro (eg. fuel prices continue to rise, staff shortages) but assuming that bad macro = bad micro automatically is very dumb, being an entrepreneur anyway is about spotting opportunities in the market anyway that others haven't capitalised on.