I would wager that 10 times (perhaps 50 times or more) as many people can make a simple Excel worksheet as could program the same functionality in a mainstream, general purpose "programming" language.
The quotes seem unnecessary. Programming isn't just an expert activity. Many applications offer macro recording and other facilities to create programs without scripting. Dataflow programming is often used in graphics and media applications. Spreadsheets are one very successful implementation of dataflow programming.
What Excel doesn't let you do (without heroic effort in support toolchains) is software engineering...
It also allows domain experts to program. So while they may not be expert programmers, they are experts in the problem area and will come up with expert solutions.
How is a spreadsheet “inclusive?” What does that mean?