I largely agree with you. Spreadsheets are arguably the most successful no-code/low-code tool out there in that they've enabled millions of people to automate some task or complex process and effectively become programmers, despite the fact that I personally find an empty spreadsheet to be kind of intimidating to look at.

I think the only point of disagreement we might have is that I don't necessarily think that the speadsheet, even an improved one, is the best graphical model/structure for articulating complex processes, but it seems to be the best we've discovered thus far.