Thin compared to gun made in the US? Yes. US made doubles are much heavier, thicker in the barrels if you want to call them that.

You do understand that pressures tend to be higher in smaller gauges do you not? Anything under .025 is thin in my books. If you are going to shoot only CIP loads or RST loads intended to keep pressure down you may be safe but with a small margin. If you are going to shoot US made, standard off the shelf factory loads, with pressure much higher than CIP then no it is not safe to shoot. The world is full of thin barreled gun which are borderline safe or not safe. What is your level of risk tolerance and what are you risking if wrong? Money or flesh?