My aplescript wont work!

That's because you're using 'Open Location', which is NOT a Google Chrome command. It's also not a Safari command.

Open Location is a standard addition - meaning it's handled outside of any application - in this case it's something the OS uses to decode the URL, find the appropriate handler application, and invoke it. In other words, if your default browser is set to Chrome, it will open in Chrome; if it's set to Firefox then it will open in Firefox. You can also pass it mailto:, ftp:, file:, or any other URL and it will (attempt to) handle it.

So whenever you use 'Open Location', your default browser is going to launch, which is why it appears to not work with Chrome.

It's actually a simple way to avoid the script having to know which specific app to target for common URLs.

If you want to specifically target Chrome, then you'll need to add Chrome-specific commands to get it to open a URL. Something like:

set theURL to "https://support.apple.com/en-us/HT208436"

tell application "Google Chrome"
	if windows ≠ {} then
		make new tab at the end of window 1 with properties {URL:theURL}
	else
		make new window
		set URL of (active tab of window 1) to theURL
	end if
	
	activate
end tell

Replace:

if button returned of the result is "Safari" then tell application "Safari" to open location

with:

if the result is {"Safari"} then tell application "Safari" to open location

(182598)