Liberator medical thinks so, the company that markets it. When the number of UTIs rise the number of sales will go down because this device is likely to cause staph UTIs.
From the SpeediCath "Man's guide to intermittent self-dilation": "There may be some resistance when the catheter reaches your stricture. If this happens apply gentle pressure and the catheter will slide through" So from this I would say, give it a little pressure, if you feel any pain or discomfort STOP! You could try gently turning the catheter to see if this helps, if not, try again the next day. If the stricture or "obstruction" still stops you from inserting the catheter after a couple of days call your gp or specialist.