Can we just say welcome?

Certainly, here's a simulated questioner's tone based on the short paragraph "Can we just say welcome?": "So, let me just clarify, are we simply acknowledging the arrival of a new guest or participant with the phrase 'Can we just say welcome?' Is this a casual greeting intended to make them feel at ease, or is there a deeper meaning or purpose behind it? Are we implying that a formal introduction or ceremony isn't necessary, or are we simply being polite and courteous? I'm curious to know the context and intent behind this seemingly straightforward statement.