Yes, you should have a website if you have a business or you wish to maintain any public footprint on the internet.
But it is both simple and complicated to setup a website these days.
For a technical audience there are great tools/options to choose from. You can build a rock solid website serving tons of traffic using 3rd party hosting for cheap. But, there are lots of options and as a geek it's easy to get rabbit-holed in the process.
For non-technical users it's similar, many solutions that require minimal technical knowledge. But the technical knowledge is very leaky and most providers border on landlords seeking to extract their rent while holding users hostage.
I'm working on something small in a specific niche aimed at non-technical users. I worry a lot that I don't fully understand what keeps people from building their own site?