And in my example I'd think that the lumber would come from privately owned land/lumber operations. Not sure what you mean by ease of contract.
See my other comment in regards to taxes in general.
These numbers on budget shortfalls, deficits, and CBO estimates that are thrown around every time a tax credit or additional tax is considered are very much affected by revenue collection. In SF where there's quite a bit of direct democracy, they were also thrown around to the public when considering several tax or tax-adjacent referenda such as the recent tax on high-revenue businesses or a few on the upcoming ballot, all of which come with their own budget estimates. I'm doubtful that all of this would have no effect the next time balancing the budgets is considered.
For your final selfish argument, it's debatable to say it's better for you that others spend their money on taxes rather than less on taxes and spending it however they please.
The IRS doesn't determine tax rates or tax laws, it just enforces them. And to note, all of the infrastructure that pays for the road the delivery company used the deliver the couch, and the forests which provided the lumber for the couch's frame, and the ease of contract which made all of these transactions...were all made possible by the taxes collected and paid by all of these people.
Tax is a vital part of the economy. It's the price (fee) you pay for the government services that underpin everything else.