The desire to use Huawei is that they're a major player in the telecommunications infrastructure market. The governmental advice / requirements not to use Huaw

The desire to use Huawei is that they're a major player in the telecommunications infrastructure market. The governmental advice / requirements not to use Huawei equipment is because China is not trusted, and diplomatic relations with China are bad. There appears to be no hard evidence that Huawei have abused their trust, yet at the same time, that doesn't mean they couldn't. It's not possible to differentiate innocent security vulnerabilities with underhandedly engineered ones. Ultimately it doesn't matter whether Huawei are abusing their position of trust or not, but whether they could be used as a weapon by their host country, to which the answer is that they could be, as for any such company anywhere. So ultimately it's a diplomatic issue.