It’s all just a big wind up. Currently there is a song in the charts called “I might kill my ex” with the lyrics, “not the best idea His girlfriend’s next”. If the whole thing was not a giant wind up to generate news clicks and advertising sales off of it, then songs like the one above would be vetted and not allowed to be released in the first place. Don't fall for it, continue to sing/listen to Delilah!
As I mentioned before, please look at the background of this rather than jump to conclusiions. The WRU are subject to serious accusations of sexism and homophobia including threats of sexual violence to one woman. The banning of the song is absolute tokenism to try and be seen to be doing somethign and that has been seen through by most people but it is not an attempt to get clicks or advertising sales.
With regards the song in the charts, I guess it is not being played over the loud speakers at many sporting matches but, again, look at the facts of the story. The ban is actually just stopping choirs performing at the stadium from performing it There is no wider ban. Again, I suspect most Welsh choirs do not perform the chart hit you mention.
Please be outraged at the WRU for what they are accused of but please also look into the reason for the ban as this all helps bring attention to the real issue.