I agree ,and I don't.
Do you need a Flugel?,,, probably not at this stage of your playing .
Should you get one ? If you have the money and can find a nice one ?,,,,sure.
I applaud your curiosity ,looking for different horns is a lot of fun , and as Rowuk says we can add another dimension to our playing ,I think you should start trying out different Flugel's when you get the chance , When you have played a few, then you can make a choice based on sound and playability ,not cool factor .
Take your time and listen very carefully to yourself ,If you can get someone who has a flugel to let you play it for a few weeks even better !
I might be wrong here? ,, but I haven't noticed anything that will hurt your trumpet playing if you play flugel .
In my mind anything that helps you WANT TO play is good .
You may want to wait until you are better on trumpet before getting one ? I don't know how long you have been playing but ,only you can judge .
Enjoy the Journey .